Driving mechanism for intermittently-rotating shafts



May 20, 1930. H I H 1,759,535

DRIVING MECHANISM FOR INTERMITTENTLY ROTATING SHAFTS Filed July 2, 1926 I I f I i Jn ere/afar Patented May' 20, 1930 cARL LouisBiron;"on nviBAcm GERMANY 1 Application tieaqu yi gl, 1926;, Serial No My invention relates to improvements in driving mechanisms for intermittentlyrov {rating shafts such as are used'for example in I I g "clamping means are provided for arrestmg' orthe like or in chain-stitching-machines "the driven member, by means of which the sewing-machines for jointing knitted fabrics used for similar purposes. As is known to those skilled in the art [in machines for ]o1nting knitted fabricsth'e fabrics are fed and brought into'stitching' position'by means of] The shaft-s or axes of the said v .gshowin'g one form of the driving mechanism,

Fin. 2 is a bottom View of Fig. 1 lookingin I feed .rolls. rolls are connected with 'eachother bygear wheels so that only oneof the axes need be connected with the driving mechanism. In chain-stitching-machines intermittent movement is imparted to the needle disk. In both casesintermittent movement is imparted to the driven members in order that the fabric is at rest at certain moments'for stitching the needle into the same and the same therefrom.

, Machines of the class referred to are oper- I ated at high Velocity, the number of the stitches per minutebeing as high as 4000. Therefore the feed rolls have very'high velocities, so that it is difficult to provide reliable mechanisms for imparting intermittent movement thereto 'so-muchthe more as the feed movement must be very exact, because otherwise the length of thestitches is differ vide a driving mechanism of the character referred to which is exact'in operation even ,at high velocity, and with this object in view retracting -To the bottom face of the frame 24 120 ,2134, 5min Germany any s, 1925.

arresting the driven member when the drivmg stroke of the drlvmg member is finished,

movement of the axis and the feed rollor needle disk is immediately interrupted when the "driving member completes itsdriving movement; j

Fig. 1 "is an elevation partly in section Jthe direction of the arrow 5, o I

. 1 Fig. 3 isasectional elevation taken on the line 6 6 of Fig. 2, 7 i g Fig. 4 is a detail view 7 showing the mai n V parts 'of the free-wheel mechanism and the clamping means therefor, and

' Fig.' 5 isa perspective view 'of the clamp-,

ing means forresting the driven member. I

On the shaft 8, which is adapted to carry lone ofthe feed rolls, a .gear wheel 9 and a ring 10 are mounted, the gear wheel 9 being nsolesteam ba reae'r idimay made integralw'iththe ring 10 or fixed thereto by means of a screw 11.." Within the ring 10a disk 12 is loosely mounted onlthe shaft 8, which disk is; formed with. three notches 13 having their bottom 1 faces disposed eccentrically' of the axisfll8 and'the'f inner circumference of the ring 10.. In each ofthe said notches there'is a-rol'ler 14 and the said rollers are held in contact withthe To the disk 12 a plate 17 is fixed fines the rollers 14 within their notches and is made integral with an arm 18 adapted to be reciprocated from the driving mechanism of the. machine as has" been indicated by the nn meralsI and II showniin Fig. 2. All the parts so far described are held in position onthe axis 8 by means of a. ring 20 fixed to the shaft 8 by means of a screw 19. o 5

, two rails 21'and 22 are secured, and between the; said rails an arm 25 is rockinglymounted, whicharm is fixed to a curved spring26 secured to. the rail 22, the said-spring tending to rock 'the arm 25 around the edge 23 0f V p I 30 r therend walls of he notch 27 with. the ring is sufficient instantaneously to arrest the the railv 22.; The tension of the spring 26 is and prevent motion in the opposite'direction.

2. An automatic one-way brake comprise a .25 isformed with a notch 27 by means of ing in combination .a rotatable; cylindrical which it embraces the ring 10 from thebotwmember, a pair of fixedly mounted supports,

tom side thereof, the diskc12 and plate 17 a'spring regulated byimeans of a screw"30. The arm secured to one of said s'upports, an

beingformed with a notch 29 permitting the adjusta le abutme'nt for said spring on the 'Troek n movement of the disk 12 and the other-of said supports, and alever mounted 7 Q plate 1 without interfering with the arm 25. on said spring one endof'said lever normally tion by means of a plate 31'secured to V .t'om faces of the railsg21 andw22 by'meansjof; oylindrica lflmembertf 7 I a g v g V r i 3.1An automatic one-way brake comprisin combination a rotatable element, v 25 the innerand outer edges of the notch 27 {means adapted for movement into one pOSli screws'32. I p V Y 1 Bythepressure-ofthe-spring'26 on the arm ng are held in contact-with theouter-and'inner' tion for frictionally retarding rotation of The arm andsp'rin'g 26 are held in posiengaging one of saidsupports; said lever be-f hebot "ing provided witha notch for engaging said' 5 I V 9 v V circu nferentialfaoes of 'the 'ring l-O, so that said element in one direct on and movable out 7 j the, arn1f25 andl' t'he spring" 26 provide" a of said position by rotation of said element Q [clamping mechanism of simple construction. in the opposite direction, a spring for 'sup- The rot rymovemen imparted'to, th ing po ing a meansand for'normally rging r t of the rollers 14 is not materially affected by f and an adjustable support forsaid spring for I the. engagement ofthe arm 25 with the inner, 'regulatingthe degree offrictional contact 10'bythe diski l2 throughthe intermediary the same into element retarding position,

' and outer faces 0f the ring 140, because when between said means and said element. I

arm 25 is slightly rocked in a direction for signature,

10, But wrea hs disk 121 at the end of' imparting rotary movement to thering 10 the In testimony whereof; I hereunto aflix' my CAR omsf AoH;

releasing the frictional pressure on the ring itsloperative' stroke and the clamping'enrotary movement of the said parts by impact.

masses to be accelerated and retarded are age ent o th roll rs. &- with the ring 10 s interrupted, the frictional engagement of ring IOandthe axis ,8 and-to prevent further 1 In constructions ofthe class referred to the small. j Therefore, during the forward movement of the ring 10 the braking action of c "the arm '25 is not-objectionable, but it is sufiicient for instantaneously arresting the movable parts a SOOIlas the driving power is relie ed; l V I While in describing'the invention referen'ce has been made to a particular example embodying the same I'wish it to be runde ri r stoodtha't'my invention is not limited to the constructions shown in the drawings, and h t e s c ange may b rmade in the ge I e'ral; arrangement of the-apparatus, and the construction of its parts without departing f om the inventi n 'claimr M 1. Means for preventing return movement ofa'n intermittently revolved, member, comprising in combination, a cylindrical member se ured to said int rmittent yre o v m her, a pair of rails fixedly mounted atone I side of the axis ofiro'tation, lever member 2 the i ner andb er su ace of said y n- '7 yieldingly mounted 'therebetween, having a notch with parallel walls adapted to engage 'd ical'm er, S d e er member'o'peratingc to yield p mit m t on. o s id, cylinder t in one direction but operating to automatigally clamp sai 037mm: nns. Walls 

